so did technology. and recently it is the digital footprint of dalliances that have led to some spectacular falls. remember congressman anthony weiner? he tweeted a photo of his privates. the story broke, he denied it, claiming his twitter account had been hacked, eventually fessed up and resigned. >> i apologize first and foremost to my wife, and to my family. >> there was client number nine, aka eliot spitzer, the governor of new york, and former cnn anchor. when investigators followed his money, it revealed he spent thousands as a regular client of a call girl. he, too, stepped down. >> i've acted in a way that violates my obligations to my family, and that violates my or any sense of right and wrong. >> and now comes general petraeus, done in by a simple click of the mouse. >> e-mail traffic is -- it is amazing that e-mail is still being used in such a careless and reckless fashion because it is just evidence against you. >> modern science can also play a role. remember president clinton and the dna